CN110107620B - Friction self-locking mechanism of lifting column and lifting column - Google Patents
Friction self-locking mechanism of lifting column and lifting column Download PDFInfo
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- CN110107620B CN110107620B CN201910371201.5A CN201910371201A CN110107620B CN 110107620 B CN110107620 B CN 110107620B CN 201910371201 A CN201910371201 A CN 201910371201A CN 110107620 B CN110107620 B CN 110107620B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 62
- 230000000670 limiting effect Effects 0.000 claims abstract description 10
- 210000000078 claw Anatomy 0.000 claims description 25
- 230000035939 shock Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/02—Underframes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/02—Underframes
- A47B2013/028—Underframes held together by screw-threaded tie rod
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2200/00—General construction of tables or desks
- A47B2200/0035—Tables or desks with features relating to adjustability or folding
- A47B2200/005—Leg adjustment
- A47B2200/0056—Leg adjustment with a motor, e.g. an electric motor
- A47B2200/0057—Leg adjustment with a motor, e.g. an electric motor situated under the worktop
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a friction self-locking mechanism of a lifting column and the lifting column with the friction self-locking mechanism. The friction self-locking mechanism of the lifting column comprises a friction piece and a connecting piece, wherein the friction piece and the connecting piece are sleeved at the driving end of the lifting column and rotate along with the driving end, the friction piece and the connecting piece are respectively positioned at the inner side and the outer side of a driving box, the driving end is rotatably assembled with the driving box of the lifting column through the axial limiting effect of the friction piece and the connecting piece, the friction piece acts on the outer side surface of the driving box, a friction force for realizing self locking is provided, and the connecting piece is used for being connected with a transmission device in the driving box to transmit the rotating power of a motor. The beneficial effects of the invention are as follows: the friction self-locking mechanism has the advantages that the self-locking force is increased along with the increase of the load, the self-locking force can be increased, the higher load can be borne, the self-locking force attenuation can not be generated after multiple operations, meanwhile, the cost is reduced, and the assembly process is simplified.
Description
Technical Field
The invention relates to the technical field of lifting columns, in particular to a friction self-locking mechanism of a lifting column and the lifting column with the friction self-locking mechanism.
Background
In modern office environment, office desk, computer desk, conference desk and the like are required to have lifting function in consideration of health and comfort, and office staff can adjust the height of a desk top according to own height and sitting posture, so that comfort is improved, or work is directly standing, and fatigue and strain of neck and waist are relieved. The height-adjustable table is composed of at least 2 lifting columns, in the practical use process, if the lifting columns have no reliable self-locking mechanism, the lifting columns can slowly slide downwards under the action of a tabletop load, so that the tabletop is unbalanced and inclined, and the tabletop collapses more seriously, so that the self-locking reliability is improved, and the table becomes a technical difficulty that a product must overcome at the present stage.
In chinese patent CN100425874C an actuator, in particular a linear actuator, is disclosed comprising a reversible motor driving an adjustment member by means of a transmission. In order to increase the self-locking capacity of the actuator, the actuator is provided with a self-locking spring, one end of which is fixed to the rotating part of the actuator so that the self-locking spring is driven in the direction of rotation on the cylindrical part, where the self-locking spring is in a relatively stationary state. When the motor is turned off, the load on the actuator moves the adjustment member as much as possible and the movement of the self-locking spring is prevented, thereby tightening the self-locking spring around the cylindrical portion.
The structure is generally characterized in that the self-locking spring only provides small torque to compensate small self-locking force, the defect of the self-locking force can be relieved, hidden danger caused by the defect of the self-locking force cannot be eliminated, the machining precision requirement of the self-locking spring is high, the mounting process is relatively complicated, and the self-locking spring can generate self-locking force attenuation after multiple operations, so that the self-locking force is greatly reduced, and the reliability of the lifting column is deteriorated.
In chinese patent CN108466994a, a transmission and a lifting column are disclosed, and on the basis of a braking torsion spring, the lifting column of the patent provides an additional self-locking force by an additional braking torsion spring, thereby improving the braking effect. However, the technical problem that the self-locking force of the self-locking spring is attenuated after multiple operations still cannot be avoided.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the self-locking mechanism is simplified, and the problem of self-locking failure is avoided.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a friction self-locking mechanism of lifting column, including friction piece and connecting piece, friction piece and connecting piece all suit are at the lead screw drive arrangement's of lifting column drive end to along with the synchronous rotation of drive end, friction piece and connecting piece are located the inside and outside both sides of drive box respectively, and the drive end is in the same place with the rotatable assembly of drive box of lifting column through the axial spacing effect of friction piece and connecting piece, and the friction piece effect is on the lateral surface of drive box, provides the frictional force that is used for realizing the auto-lock, and the connecting piece is used for being connected with the transmission in the drive box, to the rotation power of drive end transmission motor.
Further, the connection member may transmit the rotation power of the motor to the driving end in two specific forms, respectively: a transmission structure is arranged between the connecting piece and the friction piece, and the connecting piece transmits the rotation power of the motor to the driving end through the friction piece; or a transmission structure is arranged between the connecting piece and the driving end, and the connecting piece directly transmits the rotation power of the motor to the driving end.
Further defined, the drive box structure between the friction member and the connecting member is a drive box body of the drive box; or the driving box structure between the friction piece and the connecting piece is an assembling baffle plate assembled on the driving box body through a fastener.
Further limited, the upper end of the friction piece is provided with a transmission hole, the lower end of the connecting piece is provided with a transmission part extending downwards, the transmission part penetrates through the driving box and is inserted into the transmission hole, the transmission part and the transmission hole are in matched transmission through a spline structure, a transmission structure between the connecting piece and the friction piece is formed, and the connecting piece transmits the rotation power of the motor to the driving end through the friction piece.
Further limited, the friction piece is sleeved on the driving end in a sliding manner through the spline structure and is restrained at the lowest position axially sliding on the driving end by the limiting structure, or the friction piece is sleeved on the driving end and is fixed with the driving end, so that the friction piece synchronously rotates along with the driving end.
Further defined, the transmission portion is a spline section of the upper section inserted into the transmission hole through a shaft section of the screw shaft hole of the drive case and a lower section.
Further defined is that the upper end of the connecting member has a driving claw, through which the connecting member is connected to a driving means in the driving box.
Further defined, the connecting member is mounted on the driving end by a nut screwed on the driving end, and an elastic member is further provided between the nut and the connecting member for compensating for the inter-shaft gap.
Further defined, the resilient member is a wave washer.
Further defined, the connector has a counterbore extending from top to bottom, and the nut and spring are assembled with the driver end within the counterbore.
Further defined, the lower end surface of the connector is in contact with the drive cassette by a raised structure.
Further defined, the driving end of the screw rod driving device is the end part of the screw rod, and the screw rod is driven to lift through rotation of the screw rod.
Further defined, a shock pad is provided under the friction member for shock absorption between the friction member and the nut.
More specifically, the end face of the screw thread of the screw rod is used as a limiting structure for restraining the lowest position of the friction piece in the axial sliding mode on the driving end, a gasket is arranged between the friction piece and the end face of the screw rod thread, the shock pad is located below the gasket, and a counter bore for accommodating part of the shock pad is further formed in the screw nut.
The lifting column comprises a driving box, a screw rod driving device and a column tube, wherein the driving box is fixed at the upper end of the column tube, the screw rod driving device is positioned in the column tube, a motor in the driving box drives the screw rod driving device to stretch out and draw back through a transmission device, the screw rod driving device drives the column tube to stretch out and draw back, and the driving end of the screw rod driving device is provided with the friction self-locking mechanism.
Further defined, the transmission device in the driving box comprises a worm wheel arranged on a bracket of the motor, a worm on an output shaft of the motor drives the worm wheel to rotate, a concave hole with a built-in transmission claw is formed in the end part of the worm wheel, the transmission claw of the connecting piece is inserted into the concave hole of the worm wheel and is in driving fit with the transmission claw of the worm wheel, and a shock pad is embedded between the transmission claw of the connecting piece and the transmission claw of the worm wheel.
The beneficial effects of the invention are as follows: compared with the prior art adopting a self-locking spring, the self-locking force of the friction self-locking mechanism can be improved along with the increase of the load, can bear higher load, cannot generate self-locking force attenuation after multiple times of operation, simultaneously, the assembly of the screw rod and the driving box by adopting a bearing structure is canceled on the existing structure, the cost is reduced, and the assembly process is simplified.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of an assembled structure of a friction self-locking mechanism of embodiment 1 of the present invention.
Fig. 2 is an exploded view of the friction self-locking mechanism of embodiment 1 of the present invention.
Fig. 3 is a cross-sectional view of the friction self-locking mechanism of embodiment 1 of the present invention.
Fig. 4 is an exploded view of the friction self-locking mechanism and the drive box inner part of embodiment 1 of the present invention.
Fig. 5 is an exploded view of the connection member of embodiment 1 of the present invention and the worm wheel on the motor.
Fig. 6 is a sectional view of the lifting column of embodiment 1 of the present invention.
Fig. 7 is a cross-sectional view showing the assembled relationship of the friction self-locking mechanism and the drive case of embodiment 2 of the present invention.
Fig. 8 is an exploded view of the assembled relationship of the friction self-locking mechanism and the drive case of embodiment 2 of the present invention. In the figure, 1, friction element, 1-1, drive hole, 2, connecting element, 2-1, drive part, 2-1-1, shaft section, 2-1-2, spline section, 3, screw rod, 4, driving box, 5, assembly baffle, 6, drive claw, 7, nut, 8, waveform gasket, 9, gasket, 10, bump structure, 11, screw rod driving device, 12, shock pad, 13, screw nut, 14, motor, 15, worm gear.
Detailed Description
As shown in fig. 1,2, 3, 4,5 and 6, a lifting column is generally used as a desk leg of an office desk, a computer desk or a conference desk, and realizes the lifting function of the desk top, and comprises a driving box 4, a screw driving device 11 and a column tube, wherein the driving box 4 is fixed at the upper end of the column tube, the screw driving device 11 is positioned in the column tube, a motor 14 in the driving box 4 drives the screw driving device 11 to stretch and retract through a transmission device, the screw driving device 11 drives the column tube to stretch and retract, a friction self-locking mechanism is arranged at the driving end of the screw driving device 11, and when the screw driving device 11 adopts a lifting form of a rotation driving screw 13 of the screw 3, the driving end of the screw driving device 11 is the end part of the screw 3.
The friction self-locking mechanism of the lifting column comprises a friction piece 1 and a connecting piece 2, wherein the friction piece 1 and the connecting piece 2 are sleeved at the end part of a screw rod 3 of the lifting column and rotate together with the screw rod 3, the friction piece 1 and the connecting piece 2 are respectively positioned at the inner side and the outer side of a driving box 4, the end part of the screw rod 3 is rotatably assembled with the driving box 4 of the lifting column through the axial limiting effect of the friction piece 1 and the connecting piece 2, the friction piece 1 acts on the outer side surface of the driving box 4 to provide a friction force for realizing self locking, the connecting piece 2 is used for being connected with a transmission device in the driving box 4, a transmission structure is arranged between the connecting piece 2 and the friction piece 1, and the connecting piece 2 transmits the rotation power of a motor 14 to the screw rod 3 through the friction piece 1.
The driving box structure between the friction piece 1 and the connecting piece 2 is an assembling baffle 5 assembled on the driving box body through a fastener, namely the driving box comprises the driving box body and the assembling baffle 5 assembled on the driving box body through the fastener. The assembly baffle 5 is provided with a screw shaft hole penetrating through the screw 3.
The friction piece 1 is slidably sleeved on the screw rod 3 through a spline structure and is restrained by a limiting structure at the lowest position axially sliding on the screw rod 3, the limiting structure is provided with an end face which is a screw thread on the screw rod in the embodiment, a gasket 9 is arranged below the friction piece 1 in a cushioning mode, and the gasket is located between the friction piece 1 and the end face of the screw thread and used for guaranteeing the limiting effect.
The upper end of the friction piece 1 is provided with a transmission hole 1-1, the lower end of the connecting piece 2 is provided with a transmission part 2-1 extending downwards, the transmission part 2-1 penetrates through the driving box 4 and is inserted into the transmission hole 1-1, the transmission part 2-1 and the transmission hole 1-1 are in matched transmission through a spline structure, and a transmission structure between the connecting piece 2 and the friction piece 1 is formed.
The transmission part 2-1 is divided into an upper shaft section 2-1-1 penetrating through the screw shaft hole of the driving box 4 and a lower spline section 2-1-2 inserted into the transmission hole 1-1.
The upper end of the connecting piece 2 is provided with a transmission claw 6, and the connecting piece 2 is connected with a transmission device in the driving box 4 through the transmission claw 6.
The connecting piece 2 is assembled on the screw rod 3 through a nut 7 screwed on the screw rod 3, and an elastic piece is arranged between the nut 7 and the connecting piece 2 and used for compensating the inter-shaft gap. The elastic member is a wave washer 8. The connecting member 2 has a counter bore extending from top to bottom, in which a nut 7 and an elastic member are assembled with the screw 3.
The lower end surface of the connecting member 2 is in contact with the fitting shutter 5 of the drive cassette 4 through the projection structure 10.
The driving box 4 of the lifting column is internally provided with a motor 14 and a transmission device, the transmission device comprises a worm wheel 15 arranged on a bracket of the motor 14, a worm on an output shaft of the motor 14 drives the worm wheel 15 to rotate, a concave hole with a built-in driving claw 6 is formed in the end part of the worm wheel 15, the driving claw 6 of the connecting piece 2 is inserted into the concave hole of the worm wheel 15 and is in driving fit with the driving claw 6 of the worm wheel 15, and a damping pad 12 is embedded between the driving claw 6 of the connecting piece 2 and the driving claw 6 of the worm wheel 15. The number of driving claws 6 of the connecting member 2 and the number of driving claws 6 of the worm wheel 15 are specifically three.
The connecting piece 2 and the friction plate 1 are made of polyoxymethylene.
The working principle of the friction self-locking device is explained by the following description:
the motor 14 in the drive box 4 of the lifting column drives the worm wheel 15 to rotate through the worm, the transmission claw 6 of the worm wheel 15 is in driving fit with the transmission claw 6 of the connecting piece 2, the connecting piece 2 and the worm wheel 15 are enabled to rotate together, the connecting piece 2 provides enough torque to drive the friction piece 1 to rotate through the polygonal spline structure, the friction piece 1 drives the screw rod 3 to rotate through the inner spline fit and the outer spline fit, the screw rod 3 rotates to achieve lifting of the lifting column, and lifting of the lifting column is achieved when the lifting column is used as a table leg.
The assembly baffle 5 is fixed on the driving box 4 and kept static, the friction piece 1 continuously rubs with the assembly baffle 5 when rotating, self-locking force is provided, the friction piece 1 can be worn by long-time lifting of the lifting column, the wearing capacity can be compensated through the compression capacity of the wave-shaped gasket 8, and therefore gaps can not be generated in the axial direction, and the reliability and the service life of products are improved.
The load born by the lifting column is mainly gravity, the larger the load born by the lifting column acts between the friction piece 1 and the assembly baffle 5, the larger the contact pressure between the friction piece 1 and the assembly baffle 5 is, the larger the friction force is, and the larger self-locking force is provided, so that the problem that the reliability of the lifting column is poor due to the fact that the self-locking force is attenuated after the traditional self-locking spring operates for many times is solved.
The contact pressure between the connecting piece 2 and the assembly baffle 5 is mainly produced by the wave-shaped gasket 8, the contact pressure is relatively small, meanwhile, the connecting piece 2 is in contact with the assembly baffle 5 through the convex structure 10, so that the friction force is relatively small, the connecting piece 2 is not easy to wear relative to the friction piece 1, only small self-locking force is provided, and the self-locking force of the lifting column is mainly from the friction piece 1.
Compared with the prior art, the invention eliminates the assembly of the screw rod 3 and the driving box 4 by adopting a bearing structure, reduces the cost and simplifies the assembly process.
The above examples are made on the basis of the inventive idea, which is within the scope of the invention, as well as other embodiments.
Example 2 differs from example 1 in that: the connecting piece 2 directly transmits the rotation power of the motor 14 to the screw rod 3, and particularly, the connecting piece 2 and the screw rod 3 are in transmission fit through an internal spline and an external spline.
Example 3 the design of the assembly of the baffle 5 in example 1 is for ease of assembly, nor does it exclude the following embodiments from use, with the difference compared to example 1 that: the assembly baffle 5 is removed, the screw shaft hole is directly formed on the driving box body, and the driving box structure between the friction piece 1 and the connecting piece 2 is the driving box body of the driving box 4, as shown in fig. 7 and 8.
Example 4 differs from example 1 in that: the friction piece 1 is sleeved on the screw rod 3 and is directly fixed on the screw rod 3 through a fastener, or the friction piece 1 is directly fixed on the screw rod 3 through injection molding in an injection molding mode, so that the friction piece 1 is fixed with the screw rod 3, even though not excluded, the friction piece 1 is a part of the screw rod 3 and is processed through a mechanical processing mode.
Claims (14)
1. A friction self-locking mechanism of a lifting column is characterized in that: comprises a friction piece (1) and a connecting piece (2),
The friction piece (1) and the connecting piece (2) are sleeved at the driving end of the screw rod driving device (11) of the lifting column and synchronously rotate along with the driving end, the friction piece (1) and the connecting piece (2) are respectively positioned at the inner side and the outer side of the driving box (4), the driving end is rotatably assembled with the driving box (4) of the lifting column through the axial limiting function of the friction piece (1) and the connecting piece (2),
The friction piece (1) acts on the outer side surface of the driving box (4) to provide friction force for realizing self-locking,
The connecting piece (2) is used for being connected with a transmission device in the driving box (4) and transmitting the rotation power of the motor (14) to the driving end;
The upper end of the friction piece (1) is provided with a transmission hole (1-1), the lower end of the connecting piece (2) is provided with a transmission part (2-1) extending downwards, the transmission part (2-1) penetrates through the driving box (4) and is inserted into the transmission hole (1-1), the transmission part (2-1) and the transmission hole (1-1) are in matched transmission through a spline structure to form a transmission structure between the connecting piece (2) and the friction piece (1), and the connecting piece (2) transmits the rotation power of the motor (14) to the driving end through the friction piece (1);
The connecting piece (2) is arranged on the driving end through a nut (7) screwed on the driving end, and an elastic piece is further arranged between the nut (7) and the connecting piece (2) and used for compensating the inter-axle gap.
2. The lift column friction self-locking mechanism of claim 1, wherein: a transmission structure is arranged between the connecting piece (2) and the friction piece (1), and the connecting piece (2) transmits the rotary power of the motor (14) to the driving end through the friction piece (1);
Or a transmission structure is arranged between the connecting piece (2) and the driving end, and the connecting piece directly transmits the rotation power of the motor (14) to the driving end.
3. The lift column friction self-locking mechanism of claim 1, wherein: the driving box structure between the friction piece (1) and the connecting piece (2) is a driving box body of the driving box (4); or the driving box structure between the friction piece (1) and the connecting piece (2) is an assembling baffle plate (5) assembled on the driving box body through a fastener.
4. The lift column friction self-locking mechanism of claim 1, wherein: the friction piece (1) is sleeved on the driving end in a sliding manner through the spline structure and is restrained at the lowest position axially sliding on the driving end by the limiting structure, or the friction piece (1) is sleeved on the driving end and is fixed with the driving end, so that the friction piece (1) synchronously rotates along with the driving end.
5. The lift column friction self-locking mechanism of claim 1, wherein: the transmission part (2-1) is divided into an upper section (2-1-1) penetrating through a screw shaft hole of the driving box (4) and a lower section (2-1-2) inserted into the transmission hole (1-1).
6. The lift column friction self-locking mechanism of claim 1, wherein: the upper end of the connecting piece (2) is provided with a transmission claw (6), and the connecting piece (2) is connected with a transmission device in the driving box (4) through the transmission claw (6).
7. The lift column friction self-locking mechanism of claim 1, wherein: the elastic piece is a wave-shaped gasket (8).
8. The lift column friction self-locking mechanism of claim 1, wherein: the connecting piece (2) is provided with a counter bore extending from top to bottom, and the nut (7) and the elastic piece are assembled with the driving end in the counter bore.
9. The lift column friction self-locking mechanism of claim 1, wherein: the lower end face of the connecting piece (2) is contacted with the driving box (4) through a protruding structure (10).
10. The friction self-locking mechanism of lifting column according to claim 1,2,3, 5, 6, 7, 8 or 9, characterized in that: the driving end of the screw rod driving device (11) is the end part of the screw rod (3), and the screw rod (3) is driven to lift by rotation to drive the screw nut (13).
11. The lift column friction self-locking mechanism of claim 10, wherein: the damping pad (12) is arranged below the friction piece (1) and is used for damping between the friction piece (1) and the nut (13).
12. The lift column friction self-locking mechanism of claim 11, wherein: the end face of the screw thread of the screw rod (3) is used as a limiting structure for restraining the lowest position of the friction piece (1) axially sliding on the driving end, a gasket (9) is padded between the friction piece (1) and the end face of the screw rod thread,
The shock pad (12) is positioned below the gasket, and a counter bore for accommodating part of the shock pad (12) is also formed in the screw nut (13).
13. The utility model provides a lift post, includes drive box (4), lead screw drive arrangement (11) and pillar, and drive box (4) are fixed in the upper end of pillar, and lead screw drive arrangement (11) are arranged in the pillar, and motor (14) in drive box (4) drive lead screw drive arrangement (11) are flexible through transmission, drive the pillar by lead screw drive arrangement (11) again and stretch out and draw back characterized by: a friction self-locking mechanism as claimed in claim 1, 2, 3, 5, 6, 7, 8 or 9 is provided on the drive end of the spindle drive (11).
14. The lifting column of claim 13, wherein: the driving device in the driving box (4) comprises a worm wheel (15) arranged on a bracket of a motor (14), a worm on an output shaft of the motor (14) drives the worm wheel (15) to rotate, a concave hole with a built-in driving claw (6) is formed in the end part of the worm wheel (15), the driving claw (6) of the connecting piece (2) is inserted into the concave hole of the worm wheel (15) and is in driving fit with the driving claw (6) of the worm wheel (15), and a shock pad (12) is embedded between the driving claw (6) of the connecting piece (2) and the driving claw (6) of the worm wheel (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371201.5A CN110107620B (en) | 2019-05-06 | 2019-05-06 | Friction self-locking mechanism of lifting column and lifting column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371201.5A CN110107620B (en) | 2019-05-06 | 2019-05-06 | Friction self-locking mechanism of lifting column and lifting column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110107620A CN110107620A (en) | 2019-08-09 |
| CN110107620B true CN110107620B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910371201.5A Active CN110107620B (en) | 2019-05-06 | 2019-05-06 | Friction self-locking mechanism of lifting column and lifting column |
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Families Citing this family (1)
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| CN114607744B (en) * | 2022-05-11 | 2022-09-27 | 常州市凯迪电器股份有限公司 | Brake mechanism of simple installation and adopt this brake mechanism's lift stand |
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| CN210265590U (en) * | 2019-05-06 | 2020-04-07 | 常州市凯迪电器股份有限公司 | Friction self-locking mechanism of lifting column and lifting column |
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2019
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110107620A (en) | 2019-08-09 |
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